cave-in

He attacked the cave-in with the cool energy that characterized him.

If he could force a way through the cave-in there might be safety beyond.

Perhaps, after all, he had been on the other side of the cave-in and had hurried on out of the mine.

At any moment might come disaster in the shape of a cave-in or a falling tree.

The cave-in of the Landlord had not entirely removed the sense of outrage.

"There must have been a cave-in at our gold mine," said Hal.

How big a cave-in it was going to be, and what it was going to lead to, I never guessed.

You dont suppose one cave-in had anything to do with the other, do you?

Somebody has pried out some of the timbering and caused a cave-in.

There is a cave-in, and my father and five other men are shut down in the mine.